你完全不必给我买东西的！
You needn't have bought me anything!
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needn't英 /ˈniːdnt/|美 /ˈnidnt/
bought英 /bɔːt/|美 /bɔt/
解释
needn't have bought 用半情态动词 needn't 加完成不定式 have bought，表达过去买了礼物，但事后看完全没必要。C1 级语法重点在于 needn't 后接完成体表示「本不必做」。
You needn't have bought me anything!
needn't have bought 用半情态动词 needn't 加完成不定式 have bought，表达过去买了礼物，但事后看完全没必要。C1 级语法重点在于 needn't 后接完成体表示「本不必做」。